Principles of Homeostasis (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does homeostasis maintain despite external changes?
What does homeostasis maintain despite external changes?
A stable internal environment
What occurs around the optimum point in homeostasis?
What occurs around the optimum point in homeostasis?
Small fluctuations
Why is homeostasis important for enzymes?
Why is homeostasis important for enzymes?
Enzymes sensitive to pH & temperature changes
What can happen to cells if water potential of tissue fluids changes?
What can happen to cells if water potential of tissue fluids changes?
Cells may shrink, expand, or burst
What is the function of a receptor in homeostatic control?
What is the function of a receptor in homeostatic control?
Detects deviation from optimum point
What type of structure is usually an effector?
What type of structure is usually an effector?
A muscle or gland
What does a coordinator do in homeostatic control?
What does a coordinator do in homeostatic control?
Processes information & sends instructions
What happens in negative feedback when optimum is reached?
What happens in negative feedback when optimum is reached?
The system turns off
How does positive feedback differ from homeostasis?
How does positive feedback differ from homeostasis?
Causes even greater deviation
Why must effectors work harmoniously together?
Why must effectors work harmoniously together?
Sweating needs vasodilation